Measurements and modeling of vapor–liquid equilibrium for ternary mixtures of R290+R1234ze(E)+CO2

IF 2.8 3区工程技术 Q3 CHEMISTRY, PHYSICAL

Fluid Phase Equilibria Pub Date : 2025-06-22 DOI:10.1016/j.fluid.2025.114519

Yingxi Qi, Xiaolei Xu, Junqi Dong, Xi Chen, Hua Zhang

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引用次数: 0

Abstract

Heat pumps are widely used for their high energy conversion efficiency and contribution to reducing greenhouse gas emissions. Developing low-GWP refrigerants has become a research focus, and mixed refrigerants are a potential solution. This study conducted the precise measurements of the vapor-liquid equilibrium properties of the ternary mixtures of R290(1)+R1234ze(E)(2)+CO₂(3) with the liquid mole fraction of R290 varying from 0.2 to 0.4 and R1234ze from 0.5 to 0.75 over the temperature range of 268.15 to 313.15 K. The experimental VLE data of the ternary mixtures were fitted by PRSV+vdW model. The Absolute Average Relative Deviations (AARDs) for the equilibrium pressures, and the Absolute Average Deviations (AADs) for the vapor phase mole fractions of R290 and R1234ze(E) between the calculated results from the models and experimental ones were 0.82 %, 0.0038, and 0.0061 for the PRSV+vdW model. The model demonstrated a good correlation with the experimental data. The data reported is helpful for the application to new air-source heat pump system, and the VLE experiments and models are important for developing the thermophysical research of the environmental-friendly refrigerant mixtures.

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R290+R1234ze(E)+CO2三元混合物汽液平衡的测量和建模

热泵因其高能量转换效率和对减少温室气体排放的贡献而得到广泛应用。开发低全球升温潜能值制冷剂已成为研究热点，混合制冷剂是一种潜在的解决方案。在温度268.15 ~ 313.15 K范围内，R290(1)+R1234ze(E)(2)+CO2(3)三元混合物的液相摩尔分数为0.2 ~ 0.4，R1234ze为0.5 ~ 0.75，对R290(1)+R1234ze(2)+CO2(3)的汽液平衡性质进行了精确测量。用PRSV+vdW模型拟合了三元混合物的VLE实验数据。PRSV+vdW模型计算的平衡压力的绝对平均相对偏差（AARDs）和R290和R1234ze(E)气相摩尔分数的绝对平均偏差（AADs）分别为0.82%、0.0038和0.0061。该模型与实验数据具有较好的相关性。所报道的数据对新型空气源热泵系统的应用有一定的帮助，而VLE实验和模型对开展环境友好型制冷剂混合物的热物理研究具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fluid Phase Equilibria 工程技术-工程：化工

CiteScore

5.30

自引率

15.40%

发文量

223

审稿时长

53 days

期刊介绍： Fluid Phase Equilibria publishes high-quality papers dealing with experimental, theoretical, and applied research related to equilibrium and transport properties of fluids, solids, and interfaces. Subjects of interest include physical/phase and chemical equilibria; equilibrium and nonequilibrium thermophysical properties; fundamental thermodynamic relations; and stability. The systems central to the journal include pure substances and mixtures of organic and inorganic materials, including polymers, biochemicals, and surfactants with sufficient characterization of composition and purity for the results to be reproduced. Alloys are of interest only when thermodynamic studies are included, purely material studies will not be considered. In all cases, authors are expected to provide physical or chemical interpretations of the results. Experimental research can include measurements under all conditions of temperature, pressure, and composition, including critical and supercritical. Measurements are to be associated with systems and conditions of fundamental or applied interest, and may not be only a collection of routine data, such as physical property or solubility measurements at limited pressures and temperatures close to ambient, or surfactant studies focussed strictly on micellisation or micelle structure. Papers reporting common data must be accompanied by new physical insights and/or contemporary or new theory or techniques.